But the weird thing is the most widely used file format- MP4, sometimes still can't import to Adobe Premiere Pro, one of most common used video editing software. MP4 file format seems one of Adobe Premiere Pro supported native video formats for import. Someone asked me if I had all the updates, etc, I do, and still no luck with it.' MP4 File Import Failure in Adobe Premiere Pro mp4, but the MP4 file won't import into Premiere.